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Hippocampus mohnikei 

Scope: Global
Language: English
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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Actinopterygii Syngnathiformes Syngnathidae

Scientific Name: Hippocampus mohnikei
Species Authority: Bleeker, 1853
Common Name(s):
English Japanese Seahorse, Lemur-tail Seahorse
Synonym(s):
Hippocampus japonicus Kaup, 1856
Taxonomic Source(s): Bleeker, P. 1853. Bijdrage tot de kennis der ichthyologische fauna van Japan. Verhandelingen der Koninklijke Akademie van Wetenschappen 1(1): 1-16.
Taxonomic Notes: Synonym = Hippocampus japonicus Kaup 1856.

Assessment Information [top]

Red List Category & Criteria: Data Deficient ver 3.1
Year Published: 2006
Date Assessed: 2006-01-31
Assessor(s): Morgan, S.K.
Reviewer(s): Morgan, S.K. & Foster, S.J. (Syngnathid Red List Authority)
Justification:
For this species, a large portion of its putative range has not been confirmed. There is no information on densities from these areas or natural/anthropogenic activities that may impact natural populations. Therefore, it is not possible to assess trends in species numbers. However, its known habitats, a) Zostera seagrass beds in inlet water (Masuda et al. 1984), and b) estuaries (Viet Nam) (Lourie et al. 1999), are both coastal zones subject to intense fishing, boating and habitation pressure in areas of Asia such as Cambodia, China, Thailand and Viet Nam where the species is thought to occur. Common sense suggests that threats are likely to exist and that populations may be under pressure. There is no evidence for a dried trade in this species at present.
Previously published Red List assessments:

Geographic Range [top]

Range Description:Confirmed distribution: Japan, Suspected distribution: Cambodia, China, Thailand, Viet Nam (Lourie et al. 2004).

See the Supplementary Material for map of the known range of H. mohnikei.
For further information about this species, see 41005_Hippocampus_mohnikei.pdf.
A PDF viewer such as Adobe Reader is required.
Countries occurrence:
Native:
Japan
FAO Marine Fishing Areas:
Native:
Pacific – northwest
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:Unknown.
Current Population Trend:Unknown
Additional data:

Habitat and Ecology [top]

Habitat and Ecology:No research has focused on the in situ ecology of adult H. mohnikei. One study has examined planktonic juveniles of the species that range in size from 6.0–65.3 mm (standard length (SL) as measured from the tip of the tail to the dorsal margin of the opercular opening and from this point to the tip of the snout) (Kanou and Kohno 2001). These juveniles were found in plankton tows from May–January. Young from 15–34 mm SL showed high gut fullness and had consumed small prey including Oithona davisae and Penilia avirostris. In contrast, large planktonic individuals ≥35 mm showed low gut fullness, preying on larger but less abundant prey items such as species of Brachyura.
Systems:Marine

Threats [top]

Major Threat(s): Unknown.

Conservation Actions [top]

Conservation Actions: The entire genus Hipppocampus is listed on Appendix II of the CITES (Convention on International Trade in Endangered Species of Wild Fauna and Flora), effective May 2004. H. mohnikei is listed (as H. japonicus) as Vulnerable in the 1994 Viet Nam Red Data Book (Lourie et al. 2004).

Classifications [top]

9. Marine Neritic -> 9.1. Marine Neritic - Pelagic
suitability:Suitable  
9. Marine Neritic -> 9.2. Marine Neritic - Subtidal Rock and Rocky Reefs
suitability:Unknown  
9. Marine Neritic -> 9.9. Marine Neritic - Seagrass (Submerged)
suitability:Suitable  
9. Marine Neritic -> 9.10. Marine Neritic - Estuaries
suitability:Suitable  
10. Marine Oceanic -> 10.1. Marine Oceanic - Epipelagic (0-200m)
suitability:Suitable  
12. Marine Intertidal -> 12.4. Marine Intertidal - Mud Flats and Salt Flats
suitability:Unknown  
12. Marine Intertidal -> 12.5. Marine Intertidal - Salt Marshes (Emergent Grasses)
suitability:Unknown  
13. Marine Coastal/Supratidal -> 13.4. Marine Coastal/Supratidal - Coastal Brackish/Saline Lagoons/Marine Lakes
suitability:Unknown  
13. Marine Coastal/Supratidal -> 13.5. Marine Coastal/Supratidal - Coastal Freshwater Lakes
suitability:Unknown  
2. Land/water management -> 2.1. Site/area management
4. Education & awareness -> 4.2. Training
4. Education & awareness -> 4.3. Awareness & communications
5. Law & policy -> 5.1. Legislation -> 5.1.1. International level
5. Law & policy -> 5.4. Compliance and enforcement -> 5.4.1. International level

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
In-Place Species Management
In-Place Education
  Included in international legislation:Yes
  Subject to any international management/trade controls:Yes
1. Research -> 1.1. Taxonomy
1. Research -> 1.2. Population size, distribution & trends
1. Research -> 1.3. Life history & ecology
1. Research -> 1.5. Threats

Bibliography [top]

IUCN. 2006. IUCN Red List of Threatened Species.

Kanou, K. and Kohno, H. 2001. Early life history of a seahorse, Hippocampus mohnikei, in Tokyo Bay, Japan. Icthyological Research 48: 361–368.

Kuiter, R.H. 2000a. Seahorses, Pipefishes and their Relatives. A Comprehensive Guide to Syngnathiformes. TMC Publishing, Chorleywood, UK.

Lourie, S.A., Foster, S.J., Cooper, E.W.T. and Vincent, A.C.J. 2004. A Guide to the Identification of Seahorses. Project Seahorse and TRAFFIC North America, University of British Columbia and World Wildlife Fund, Washington D.C.

Lourie, S.A., Pritchard, J.C., Casey, S.P., Ky, T.S., Hall, H.J. and Vincent, A.C.J. 1999. The taxonomy of Vietnam's exploited seahorses (family Syngnathidae). Biological Journal of the Linnean Society 66: 231–256.

Masuda, H., Amaoka, K., Araga, C., Uyeno, T. and Yoshino, T. 1984. The fishes of the Japanese Archipelago. Tokai University Press, Tokyo, Japan.


Citation: Morgan, S.K. 2006. Hippocampus mohnikei. The IUCN Red List of Threatened Species 2006: e.T41005A10384456. . Downloaded on 25 February 2017.
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